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I saw the video and liked it because it gave me options that show me how you use your entire body, including your feet. I have had trouble sitting with my butt back and not spacing my feet to hold my upper body straight. I shall now place my feet as you have done.
When I walk, I sometimes feel like my back is broken and I cannot hold my body upright. With my 97th birthday next week, can you recomend any exercises, or whatever?